U-series isochron dating: A generalized method employing total-sample dissolution

UBV photometry of HK survey stars (Preston+, 1991)

UBVRI photometry in cluster Tr 18 (Vazquez+, 1990)

UCD in the IVOA context

ULTOR passive pose and position engine for spacecraft relative navigation

Ultra Low Temperature Ultra Low Power Instrument Packages for Planetary Surfaces

Ultra-Deep MIPS Imaging of the Lockman Hole

Ultra-high brightness (greater than 10(exp 21) W/sq cm) laser facility

Ultra-High-Intensity Lasers for Gravitational Wave Generation and Detection

Ultra-lightweight optics for laser communications

Ultrafast applications of uni-traveling-carrier photodiodes from measurement to signal processing

Ultrafast photodetectors with near-unity quantum efficiency

Ultrafast quantum well infrared photo detector

Ultrahigh resolution absolute Cartesian electronic autocollimator

Ultralight dust wiper mechanism for operation in Mars

Ultralight inflatable fresnel lens solar concentrators

Ultralow-noise infrared focal plane array status

Ultrasonic imaging of a beat-culture icon

Ultrasonic Imaging of an Object with Complicated Shape at the Presence of Fourier and Non-Fourier Series in the Transmitted through the Object Acoustic Field

Ultrasonic/sonic driller/corer as a hammer-rotary drill